Roller side bearing



A. STUCKI.

ROLLER SIDE BEARING.

APPLICATION FILED IUNEZS. I.I92I.

1,4%79174, l memed Aug. 29, 1922.

FUEJLQ y* 3 FUBM 9 upon that type of roller bearing. lts object NETE@ STATS PATENT @FFTCEQ ARNQLD ST'CEI, 0F PITTSBURGE, FENNSYLVANIA.

RLLER SllDlE BEARING.

To all whom t my Gomera.'

Be it known lthat l, ARNOLD STUcKi, a citizen of the United States, and a resident of Pittsburgh, in the county ofv Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Roller Side Bearings, of which the following is a specitication.

rllhis invention relates to side bearings for railway cars. f

lin prior patents, amon them, No. 13,567 reissued May 20, 1913,- have illustrated and described a roller side bearing adapted for the lower bolster and comprising a housing with a freely movable roller therein, and so arranged that when the upper bolster lifts the roller will return to midway position.

The present invention is an improvement is to provide a bearing of this type in which the liability of the roller developing dat spots or recesses on its circumference, or the track orway upon which the roller runs becoming rough or recessed, thus interr'ering with the free travel of the rolling element is prevented, while at the same time retaining the simplel and inexpensive'construction of the patented bearing.

'llo this end, the invention consists primarily in providing such a bearing with a pair instead of a single roller in order that the blows of the upper bolster will be taken by the pair of rollers, thus reducing the force of blow on any one roller, and reducing the liability of the roller developing Hat spots or recesses, or the track or way upon which the rollers travel being roughened or recessed, as above stated.

ln the accompanying drawings, Fig. 1 is a plan view of the bearing; Fig. 2 is in part a side View and in part a verticalsection thereof; and Fig. 3 is vin part an end view and in part a vertical transverse section thereof.

ln the drawing, the side bearing is shown adapted for a straight'truck bolster but it can be readily adapted to a tapered truck bolster and to receive either a straightor a tapered body bolster.

The side bearing comprises a suitable frame or housing 1 having its lower'face Specification of Letters Patent. Patented Aung., 29, 19220 .application niet rune as,

1921. l Serial No. 479,777.

shaped to correspond to the top face of the truck bolster which is indicated at 2. This housing can be attached to the bolster in any suitable way and is shown as provided on one side with a lateral projecting ear or `lange 3, and on its opposite side with a pair of laterally projecting ears 4 which are provided with holes for receiving bolts or of the housing itself or a separate wear plate of hard, tough material such as tempered steel, secured by rivets or the like to the bottom of the housing, as shown. Rolling on this bearing surface are a pair of rollers 7 each of which is of liberal diameter and length to aord sufficient resistance against the pounding action of the body bolster, which is considerable because the clearance between the upper and lower parts ofthe side bearing is often quite large. The large diameter of the rollers also forms more than mere lines of contact'with the bearing surface 6 and also reduces the rolling friction to a minimum.

The housing is provided with suitable banriers er walls to confine the rollers and prevent them jumping out under normal operating conditions. As shown, the housing has an upwardly projecting inside web or wall 8, an outside Vweb or wall 9 and end walls or webs 10. The inside and outside webs or walls are provided with openings 11 and the end walls or webs are provided with openings 12, all `extending down to the` v bearing surface 6, thereby avoiding a closed pocket and any dirt which gets into the bearing will immediately pass out through one of the several openings.

The end walls or webs are shaped to form `stops 'for the rollers, preferably havin their upper portions substantially vertica and curved as shown at 13 to the contour of the rollers, in order to provide broad contacting stops for the rollers. The side and end walls or webs extend upwardly materially above the centers of the rollers, thus rollers cannot escape under all normal conditions of use. This also enables the openings 11 and 12 to be made large enough to insure escape of dirt. This construction provides practically a skeleton cage with side and end barriers to restrain the rollers, with the top of the cage supported from the base or bottom by posts or columns.

The end portions 6 of the bottom bear ing surface 6 are inclinedl or curved upwardly, as shown, so that a roller which rides up on the same will roll back by gravity towards the central portion of the bearing surface whenever the upper bolster lifts, so that normally, that is, when the upper bolster is not in contact with the rollers, they both rest on the central portion of the bottom bearing surface, and substantially equal l dlstances from the ends of the latter. This central portion is made level, or straight, for

` a4 distance slightly greater than the diameter of one of the rollers,l so that when the two rollers rest on this 'straight portion, in contact with each other, there is a short portion l of the level bearing surface outside of the bearing point of each of the rollers. Conseg quently the rollerswhen they return to the central'portion of the bearing will not always come to rest atA exactly the same points and consequently the blows from the upper bolster will ,not always be applied to the same points of the bottom bearing surface, thus preventing the bottom Ibearing surface from becoming grooved or recessed as may be the case if the rollers always come to rest u at exactly the same positions thereon` The inside rand outside walls of the housing are placed such distances apart that the rollersjit the space between these walls quite.

closely, and sald rollers are of considerable diameter, so that .notwithstanding that they are entirely free, theyare not liable to be- 'come askew and no binding of the rollers which would prevent them from returning to their central` or normal positions is likely to occur.

In use, when the car body is not swaying and is running on a straight track, the upper bolster slightly clears the rollers and consequently both rollers will 'be on the level or central portion of bearing surface 6 as shown iny Fig. 2. Should the topbolster rest upon these' rollers when the car is running around a curve, both rollers would roll in the diyrection in which the swiveling of the truck under the car body tends to roll them, until the foremost of the two rollers begins to ride up onthe curved end portion of the bot-y tom bearing surface, whereupon the othervroller will cease to roll further. yAs soon as the body lbo'lster'lifts, the roller will be released and rolled by glravity back to the central portion of the ottom bearing surface, and both rollers will assume substantially the position shown in Fig. 2. Consequently, when the body bol-ster again comes down, its pounding action is resisted by both rollers. The return of the rollers to central position occurs immediately upon the lifting of the body bolster and consequently the blow of the body bolster never can come upon a single roller The housing l and its bearing surface 6V are sho-wn straight from end to end, although if desired they may be curved on an arc struck from the center plate or kingpin as the center and the rollers 7 slightly tapered, that is, to the frustrum of a cone whose apex is at the center of the king-pin, and in the samemanner as illustrated in In patent above identified. v

The bearing described is of simple construction, is inexpensive both as to first cost and subsequent repair, is very lasting, is of. a minimum number of parts, all of simple, compact and strong construction, and

furthermore, pockets.r in the housing are" avoided and therefore the accumulation of dirt vis prevented. The lar size of the rollers makes the device near y frictionless, and also their substantial dimensions make them strong and lasting. Both rollers are perfectly free to travel in the housing under all changes of angular relations -between the top and bottom bolsters, and will roll back to central position immediately upon the separation ofthe bolsteis.

1 claim: f

1. A side bearing for lower holsters of railway cars, comprising ahousing having its |bottom 'forming a bearing surface' transverse to the bolster andprovided with side and end walls or barriers, said bearing surface being inclined rupwardly at its ends and level intermediate its ends, and a pair of free rolls in said housing and resting on said bearing surface and normally arranged to rest upon the level intermediate portion of the bearing surface.

2. A side [bearing for lower bolsters of railway cars, comprising a housing having its bottom forming a bearing surface transverse to the bolster and provided with side and end walls o-r barriers, said bearing surface being inclined upwardly at its ends and level intermediate its ends, anda pair .of free rolls in said housing and resting on its bottom forming a Ibearing surface transverse to the bolster. and provided with side and end walls or barriers, said bearin surface being inclined upwardly atvits en s and Mamma level intermediate its ends, and a pair of per portions of the end *Walls being' subfree rolls in said .housing and resting on stantlally vertical to prevent the escape of said bearing surface and normally arranged the rollers. 10 to rest upon the level intermediate portion In testimony whereof, l sign my name. 5 of the bearing surface, the side and end NLD STUCKL walls of said housing extending upwardly Witness: y beyond the center of the rollers and the up- EDWIN 0. JOHNS. 

